lzmadecode.h

sleuthit-2.09 一个磁盘的工具集

/* 
  LzmaDecode.h
  LZMA Decoder interface

  LZMA SDK 4.40 Copyright (c) 1999-2006 Igor Pavlov (2006-05-01)
  http://www.7-zip.org/

  LZMA SDK is licensed under two licenses:
  1) GNU Lesser General Public License (GNU LGPL)
  2) Common Public License (CPL)
  It means that you can select one of these two licenses and 
  follow rules of that license.

  SPECIAL EXCEPTION:
  Igor Pavlov, as the author of this code, expressly permits you to 
  statically or dynamically link your code (or bind by name) to the 
  interfaces of this file without subjecting your linked code to the 
  terms of the CPL or GNU LGPL. Any modifications or additions 
  to this file, however, are subject to the LGPL or CPL terms.
*/

#ifndef __LZMADECODE_H
#define __LZMADECODE_H

#include "LzmaTypes.h"

/* #define _LZMA_IN_CB */
/* Use callback for input data */

/* #define _LZMA_OUT_READ */
/* Use read function for output data */

/* #define _LZMA_PROB32 */
/* It can increase speed on some 32-bit CPUs, 
   but memory usage will be doubled in that case */

/* #define _LZMA_LOC_OPT */
/* Enable local speed optimizations inside code */

#ifdef _LZMA_PROB32
#define CProb UInt32
#else
#define CProb UInt16
#endif

#define LZMA_RESULT_OK 0
#define LZMA_RESULT_DATA_ERROR 1

#ifdef _LZMA_IN_CB
typedef struct _ILzmaInCallback
{
  int (*Read)(void *object, const unsigned char **buffer, SizeT *bufferSize);
} ILzmaInCallback;
#endif

#define LZMA_BASE_SIZE 1846
#define LZMA_LIT_SIZE 768

#define LZMA_PROPERTIES_SIZE 5

typedef struct _CLzmaProperties
{
  int lc;
  int lp;
  int pb;
  #ifdef _LZMA_OUT_READ
  UInt32 DictionarySize;
  #endif
}CLzmaProperties;

int LzmaDecodeProperties(CLzmaProperties *propsRes, const unsigned char *propsData, int size);

#define LzmaGetNumProbs(Properties) (LZMA_BASE_SIZE + (LZMA_LIT_SIZE << ((Properties)->lc + (Properties)->lp)))

#define kLzmaNeedInitId (-2)

typedef struct _CLzmaDecoderState
{
  CLzmaProperties Properties;
  CProb *Probs;

  #ifdef _LZMA_IN_CB
  const unsigned char *Buffer;
  const unsigned char *BufferLim;
  #endif

  #ifdef _LZMA_OUT_READ
  unsigned char *Dictionary;
  UInt32 Range;
  UInt32 Code;
  UInt32 DictionaryPos;
  UInt32 GlobalPos;
  UInt32 DistanceLimit;
  UInt32 Reps[4];
  int State;
  int RemainLen;
  unsigned char TempDictionary[4];
  #endif
} CLzmaDecoderState;

#ifdef _LZMA_OUT_READ
#define LzmaDecoderInit(vs) { (vs)->RemainLen = kLzmaNeedInitId; }
#endif

int LzmaDecode(CLzmaDecoderState *vs,
    #ifdef _LZMA_IN_CB
    ILzmaInCallback *inCallback,
    #else
    const unsigned char *inStream, SizeT inSize, SizeT *inSizeProcessed,
    #endif
    unsigned char *outStream, SizeT outSize, SizeT *outSizeProcessed);

#endif